PROCEEDINGS OF THE UNITED STATES NATIONAL MUSEUM 
tssued (4 
SMITHSONIAN INSTITUTION 
U. S. NATIONAL MUSEUM 
Vol. 92 Washington: 1942 No. 3147 
NEW SPECIES OF BARK BEETLES (PITYOPHTHORINI) 
FROM MEXICO AND TROPICAL AMERICA (COLEOP- 
TERA, SCOLYTIDAE) 
By M. W. Buackman 
For many years specimens of Neotropical Pityophthorini have been 
accumulating in the National Museum. Many of these were recognized 
as belonging to undescribed genera and species, but other duties have, 
until recently, prevented a thorough study of these interesting forms. 
In the meantime several authors have described most of the new genera 
and several of the new species. The genera with which we are con- 
cerned in this paper are Zhamnophthorus Schedl, Neodryocoetes Eg- 
gers, Neopityophthorus Schedl, Myeloborus Blackman, Spermoph- 
thorus Costa Lima, Pityoborus Blackman, Pityophthorus Eichhoff, 
Gnathotrichus Eichhoff, and the new genus Pityophthoroides described 
herein. 
Of the 43 new species described in this paper, 138 are based upon 
specimens collected by Dr. Donald DeLeon in Mexico during January 
and February 1936; 8 upon specimens taken by Dr. EK. A. Schwarz 
in Mexico, Central America, and Cuba; 12 on specimens intercepted 
by inspectors of the Bureau of Entomology and Plant Quarantine; 2 
on specimens taken by August Busck in Panama; 1 each on specimens 
taken by J. D. Hood, H. G. Hubbard, H. F. Dietz, R. C. Shannon, 
R. P. Roba, and A. Fenyes; while two species are based on specimens 
taken by collectors of which we have no record. 
Just as in North Temperate regions, species of Pityophthorus Kich- 
hoff breed in the bark (occasionally in the pith) of either coniferous or 
broadleaf trees, as instanced by many species. Pityoborus Blackman, 
as instanced by P. tertius, new species, from Mexico, breeds in the bark 
of pine. Prtyophilus Blackman is not yet known from the Neotropics. 
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